本文研究的雷达视频回波信号模拟与仿真是针对机载下视脉冲多普勒雷达，包括目标信号、地杂波信号和噪声信号的模拟与仿真。
In the thesis, the video echo of the airborne PD radar was simulated. The simulated echoes include the signals of the target, the ground clutter and the noise.
地海面杂波特性对主要采用下视工作方式的机载脉冲多普勒（PD）雷达具有十分重要的影响。
The characteristics of the ground and sea clutter have some important effects on the airborne PD radars with look down mode.
影响机载相控阵雷达下视能力的一个重要指标是天线的超低副瓣特性。
An important index to influence the down-looking capability of airborne phased array radar is the ultralow sidelobe level of antenna.
以直升机雷达平台为背景，分析了机载雷达下视模式的杂波特性。
The characteristics of clutter in look-down mode for helicopter radar is presented.
球载雷达采用下视探测工作模式时，其检测能力主要受地杂波制约。
Detection probability of ball-borne radars operating in down-looking mode is mostly restricted by ground clutter.
球载雷达采用下视探测工作模式时，其检测能力主要受地杂波制约。
Detection probability of ball-borne radars operating in down-looking mode is mostly restricted by ground clutter.
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